Internal structure of lithium battery fire extinguishing nozzle

As the core component of modern electronic equipment, electric vehicles and renewable energy storage, lithium batteries have many advantages such as high energy density and long life. However, lithium batteries may overheat, short-circuit, or catch fire under extreme conditions, so effective fire-extinguishing systems are needed to protect personnel and equipment. Lithium battery fire extinguishing nozzles are an important fire extinguishing equipment. This article will introduce in detail the internal structure of lithium battery fire extinguishing nozzles and how they work to deal with the risk of lithium battery fires.

1. Internal structure of lithium battery fire extinguishing nozzle

The lithium battery fire extinguishing nozzle is an automatic fire extinguishing system whose working principle is based on the injection and dispersion of fire extinguishing agents. The internal structure of this system allows it to detect the source of fire and quickly release the extinguishing agent to extinguish the fire. The following are the main components of lithium battery fire extinguishing nozzles:

1. Nozzle shell

The casing of a lithium battery fire extinguishing nozzle is usually made of metal or plastic and is corrosion-resistant and high-temperature resistant to protect the internal components from the environment.

2.Detection device

Lithium battery fire extinguishing nozzles contain flame and temperature detection devices, usually using photoelectric sensors and thermistors. These devices are able to monitor the presence of fire sources and measure temperature changes in order to initiate the extinguishing process if a fire breaks out.

3. Gas storage device

Fire extinguishing nozzles usually include a gas storage device inside, which contains compressed fire-extinguishing gas. Commonly used fire extinguishing gases include halogenated alkyl gases, such as sulfur hexafluoride (SF6) or bromotrifluoromethane (HFC-23). These gases have fire-extinguishing properties and can effectively put out fire sources.

4. Valves and nozzles

The internal structure also includes valves and nozzles, which are used to release the stored fire-extinguishing gas. The valve is usually electric or mechanical and is capable of opening when a fire source is detected, releasing extinguishing gas. The nozzle is used to disperse the gas evenly near the fire source to confirm that the fire source is completely extinguished.

2. Working process of lithium battery fire extinguishing nozzle

Once the lithium battery fire extinguishing nozzle detects a fire source or abnormal temperature increase, it will start the fire extinguishing process. The following is the working process of lithium battery fire extinguishing nozzle:

1. Detect fire source

When the flame or temperature detection device of the fire extinguishing nozzle detects the fire source, it will send a signal to the control system indicating that a fire has occurred.

2. Start the valve

After receiving the fire source signal, the valve inside the fire extinguishing nozzle will be opened, allowing the stored fire extinguishing gas to flow out.

3. Spray fire extinguishing gas

Once the valve is opened, the fire extinguishing nozzle will begin to release fire extinguishing gas near the fire source. These fire extinguishing gases will quickly spread and mix around the fire source, reducing the oxygen concentration near the fire source, thereby extinguishing the fire source.

4. Fire extinguishing process

The release of fire extinguishing gas will cause the fire source to be extinguished. This method of extinguishing fires does not involve water or chemicals, so it does not trigger chemical reactions inside the battery, thus reducing the risk of secondary explosions.

5. Stop putting out the fire

Once the fire source is extinguished, the fire extinguishing nozzle will stop releasing fire extinguishing gas. Typically, a control system monitors temperature and flame and closes the valve after confirming that the source of the fire has been extinguished.

3. Structural function of lithium battery fire extinguishing nozzle

Now let us have a deeper understanding of the internal structure of the lithium battery fire extinguishing nozzle and the functions of each component.

1. Flame and temperature detection device

These detection devices are usually located on the top of the fire sprinkler head and can sense the presence of fire sources. Flame detection devices typically use photoelectric sensors capable of detecting radiation from a flame. The temperature detection device uses sensors such as thermistors or thermocouples to measure the surrounding temperature.

2. Gas storage device

The gas storage device is usually located at the bottom or side of the fire extinguishing nozzle and contains compressed fire extinguishing gas. These devices are usually steel pressure vessels capable of withstanding high pressures and maintaining gas stability.

3.Valve

Valve is a key component in controlling the release of fire extinguishing gas. They are located on top of a gas storage unit and are usually electric or mechanical. Electric valves are remotely operated via a control system in response to fire detection signals, while mechanical valves are triggered by mechanical force.

4.Nozzle

The nozzle is located at the top of the fire extinguishing nozzle and is used to spray fire extinguishing gas evenly near the fire source. The design of these nozzles usually takes into account the uniformity of gas dispersion to confirm that the gas concentration around the fire source reaches a level that is effective for extinguishing the fire source.

4. Application of lithium battery fire extinguishing nozzles

Lithium battery fire extinguishing nozzles are widely used in various fields, including electric vehicles, aerospace, military equipment and industrial equipment. Here are some common application scenarios:

1. Electric vehicles

The large lithium battery pack in electric vehicles is a potential fire risk, so the application of lithium battery fire extinguishing nozzles in electric vehicles is very important. They can respond quickly to battery fires, reducing the risk of fire to the vehicle and passengers.

2.Aerospace

Satellites, spacecraft and aircraft in the aerospace field use lithium batteries to provide power and therefore require fire suppression systems to protect them from fire threats.

3.Military equipment

Military equipment and equipment often need to operate under extreme conditions, so lithium battery fire extinguishing nozzles are widely used in military applications to confirm the stability and safety of the equipment in combat environments.

4.Industrial equipment

Lithium batteries are also used in industrial equipment, such as forklifts, drones, engineering vehicles, etc. In these applications, fire suppression systems help reduce the risk of industrial accidents.

Lithium battery fire extinguishing nozzles are critical safety equipment used to deal with the risk of lithium battery fires. Their internal structure includes key components such as flame and temperature detection devices, gas storage devices, valves and nozzles, which are used to detect the source of fire and quickly release fire-extinguishing gas to extinguish the fire source. These systems are widely used in a variety of fields, including electric vehicles, aerospace, military equipment, and industrial equipment, to protect the safety of personnel and equipment. By understanding the working principle and internal structure of lithium battery fire extinguishing nozzles, we can better understand their important role in dealing with the risk of lithium battery fires.

More information on lithium battery fire extinguishing nozzles:

The function of lithium battery fire sprinkler nozzles

What are the lithium battery fire extinguishing nozzles?

How to put out fire with lithium battery fire sprinkler

Working principle of lithium battery fire extinguishing nozzle

Lithium battery fire sprinkler application scenarios